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Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Sep. 30, 2011
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Liquid product is on the weighted average cost (WAC) basis and Parts and equipment is on the FIFO method |  |
Liquid product | $ 20,540 | $ 64,907
Parts and Equipments | 16,128 | 15,629
Total | $ 36,668 | $ 80,536

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